Other mistake: The RV's cassette player has some odd features (some of which I've never seen on a cassette player). There's a "push button" for "loudness", not "volume." There is another "push button" labeled "MO ST" - not sure what these mean. The slot for the cassette tape looks wide enough for a VHS tape. (00:11:15)
Suggested correction: There's nothing wrong with the stereo. The cassette slot is the normal size for that configuration on an 80's cassette car stereo (they're in an '87 Suncrest). The loudness button was also a common feature for that era. It boosts low and high frequencies at lower volumes (the stereo still has a volume knob). MO stands for "mono" and ST stands for "stereo."
The slot looked way too wide, even for the 1980s. I would have guessed that the "ST" meant stereo, but wouldn't that be referring to the AM/FM radio, not the cassette player? (Thanks for the "MO" clarification). [Features were still on the odd side.].
Other mistake: When Earl is walking toward his seat in the auditorium's third row at the "Glam Cosmetology Graduation", up to four seats can be seen in rows #2 and #3, but five seated graduates can be seen in row #1. Row #1 is closer to the camera than the other rows, so four or fewer graduates should be visible in row #1, not five. (01:07:20)
Other mistake: A female bull shark has between 1-13 pups. The exact number in the movie is questionable (due to their speed), but appeared to be well over the maximum 13 and perhaps closer to double this amount. Classified as "other" instead of "factual" mistake because the mother shark's DNA was altered, which could possibly explain a higher number of pups per pregnancy. (01:03:20 - 01:06:40)
Other mistake: While "dead" Mike is bent over his car's engine, his left leg moves. (00:32:40)
Other mistake: The view of Katherine's bloody body showed blood running diagonally almost exclusively from left to right, but the Ten Killer slashed her equally from right and left. Blood should have run in both directions. (00:45:05 - 00:46:25)
Other mistake: While Amy speaks with Bilel through Skype, each time Bilel is in the Internet cafe the same guy is sitting behind him.